Assembly tool



H. D. HUME ASSEMBLY, TOOL Feb. 17, 1931.

Filed Feb. 4, 1929 6 M H D m m H Patented Feb. 17, 1931 HORACE n. HUME, OFGABFIELD, WASHINGTON ASSEMBLY TOOL Application filed February 4, 1929. *Serial No. 337,449.

My present invention relates to an improved assembly tool designed for use by mechanics and others in the process of replacing the oil pan, or bottom, on the crank case of an internal combustion engine. The device of my invention is a handtool, and a plurality of these tools are employed for temporarily retainingthe gasket-sections in po sition on the top edge'of the oil pan as it is being attached to the crank casein the-first instance, or as the pan is being replaced beneath the crank case, after repairs to parts within the crank case of the motor. In many standard types of motors,:the gasket located between the bottom edge of the crank case and the top edge of the oil pan, is made up of four sections, two of which sections have angular strips at their ends, and-the other two, which fit in the depressions or semicircular pockets at the opposite ends of the pan, overlap the ends of theseangular strips.

The gasket sections which are fashioned of flexible material, as'leather, are first laidon the top flanged edge of'the. oil pan, and as the sections are light, and consequently are readily displaced, great difiiculty is experienced inholding'the sections in proper position so that they will be effective when clamped between the panand crank case. a I

The primary object of my invention is the provision of an assembly tool (four of which are used as a set) or gasket-holder bymeans of which the gasket sections or strips are held on the top of the oil pan-flange, against accidental displacement, while the pan is being applied to position beneath the crank case, in order that the packing gasket may be clamped in proper position to prevent leak between the'crank case and pan; After the pan has been attached to the crank case, the assembly tools are removed.

In the accompanying drawings I have il-.

lustrated one complete example of the physical embodiment of my invention, constructed according to the best mode I have thus far devised for the practical application of the principles of my invention, and the tools are combined and arranged in the manner required for their use.

' Figurel is a plan view showing the under side of thecrank case, and the crank shaft therein, the oil pan being removed to show the location of the gasket.v

Figure 2 is a side view showing the oilpan bolted to the crank. case, with; the gasket therebetween; V-

Figure 3 is a perspective view of the oil pan, detached, and illustrating theuse of the assemblyfltools with the gasket, sections, at the founco'rners of the rectangularpan.

- Figure-4 isa-perspective view o f one ofthe tools, showingits relationvtorthe semiscircular bearing flange at an: endof therpamantl'hlig 1116'5 is an enlarged, detail perspective view showing a portion of onset thetools-in'its relation to'the flangezof thepan anda gasketstrip or section. i 1 In order that the general assembly, trelationof parts, and utilityofthe tools may readily be understood I have :shown a well known type-of oil pan '1, having the outwardlyprojecting,horizontal flanges 2- atits sidexedges and end edges, and-the alined, semi-circular or curved flanges 3 at the 0pposite ends of the :pan: :to accommodateauthc l bearings. "Bythe-usual 'bolt-s-athelpan isattached at the undersides of the flanges I5-on'xthe lower edge ofthe crankcase-fiend the crankshaft 7.,is,indicatedinFigure 1. I 1

' The gasket, which'is fashioned of flexible material as leather, composition cork, or

other: suitable packing material, is fashioned of twos'ide stripsorsectionsS having angular ends .8, and a pairof straightstri ps 9'. The side strips and their angular ends coverthe side flanges of the panxand portions of the end flanges, and the strips 9 are .lai'dbns'the curvedflanges 3' of the pan.- The sections are. of" course provided with "bolt holes com- 7 plementarv to the holesinthe fiangesofthe pan and'oithe crank case, and Fthe:bolts pass through the holes of thergasket ,well as those of the flanges. Y

: When placed in position, the ends of the curved stripsvoverlap the adjoining ends of the angular ends 8"0f the-side strips, and the assembly tools arewutilized at the four cornersof the pan to hold the side'stnips and the overlapping -cu-rved strips, temporarily,

in position, while the pan, with the gasket thereon, is being applied to the bottom of the crank case.

A set of the tools comprises two pairs, and the tools of the pairs are interchangeable, thus providing two pairs of duplicate tools. The tools are stamped or struck from thin. sheet metal and are of sufficient rigidity, and the required resiliency, to permit facility in applying them and equal facility in withdrawing them from their holding positions, after the pan is put in place.

Each tool comprises a long, flat arm 10 and a shorter, angular arm 11, shaped to conform to the corner of the pan, and a handle 12 is fashioned at one end of the tool to facilitate its manipulation.

Two hooks 18 and lt are bent or turned inwardly and over the arms, the former over the side arm 11 and the latter over the corner or bend between the side arm 11 and the end arm 10, and these hooks or retaining lugs are spaced above the arms a suflicient distance so that the arms of the tool may be slipped under the flange 2 of the pan 1, while the hooks or lugs engage over the edge of the gasket and project slightly over the top face of the gasket, toward its inner edge.

The handle 12 forms an abutment or stop, as well as a guide, to prevent the tool and gasket being shoved inwardly out of alinement with the flange of the pan, and the slde hook or lug 13, and corner hook or lugl l, both assist in holding the gasket strips in proper position.

At the end of the end arm 10a notch 15 is formed in the inner edge of the arm, and a tongue 16, which extends transversely of the arm, is upset slightly above the plane 01' the arm 10. The tongue is spaced above the plane of the arm sufficiently to fit over the lapped ends of the portion 8 and the end of the curved strip 9, and thus the overlapping ends of the curved strips as well as the overlapped ends of the angular ends 8, at both ends of the pan, are retained in close relation to the flanges of the pan.

The usual varnish or shellac may be applied to the gasket, and when retained in position by the four tools on the pan, the latter is ready to be applied to the flanges of the crank case. The usual procedure is followed, and the bolts are applied and loosely fastened, after which the assembly tools are withdrawn. The bolts 4 are then tightened, and the gasket, whichhas been retained in proper position, is clamped between the flanges of the pan and the flanges of the crank case, to insure a leak-proof joint.

Having thus fully described my invention what I claimas new and desire to secure by Letters Patent is r 1. An L-shaped assembly tool of thin metal having a downturned handle at one end and an up-set inwardly projecting re- HORACE D. HUME. 

